using UnityEngine;
using UnityEngine.SceneManagement;
using System.Collections;
using System.Collections.Generic;
using OpenCVForUnity.CoreModule;
using OpenCVForUnity.Features2dModule;
using OpenCVForUnity.ImgprocModule;
using OpenCVForUnity.UnityUtils;

namespace OpenCVForUnityExample
{
    /// <summary>
    /// MSER Example
    /// An example of region detection using the MSER extraction algorithm.
    /// </summary>
    public class MSERExample : MonoBehaviour
    {
        // Use this for initialization
        void Start ()
        {
            Texture2D imgTexture = Resources.Load ("chessboard") as Texture2D;

            Mat imgMat = new Mat (imgTexture.height, imgTexture.width, CvType.CV_8UC3);

            Utils.texture2DToMat (imgTexture, imgMat);
            Debug.Log ("imgMat.ToString() " + imgMat.ToString ());

            MSER mserExtractor = MSER.create ();
            mserExtractor.setDelta (5);
            mserExtractor.setMinArea (60);
            mserExtractor.setMaxArea (14400);
            
            List<MatOfPoint> mserContours = new List<MatOfPoint> ();
            MatOfRect mserBbox = new MatOfRect ();
            mserExtractor.detectRegions (imgMat, mserContours, mserBbox);


            for (int i = 0; i < mserContours.Count; i++) {
                Imgproc.drawContours (imgMat, mserContours, i, new Scalar (Random.Range (0, 255), Random.Range (0, 255), Random.Range (0, 255)), 4);
            }


            Texture2D texture = new Texture2D (imgMat.cols (), imgMat.rows (), TextureFormat.RGBA32, false);

            Utils.matToTexture2D (imgMat, texture);

            gameObject.GetComponent<Renderer> ().material.mainTexture = texture;
        }
    
        // Update is called once per frame
        void Update ()
        {
    
        }

        /// <summary>
        /// Raises the back button click event.
        /// </summary>
        public void OnBackButtonClick ()
        {
            SceneManager.LoadScene ("OpenCVForUnityExample");
        }
    }
}